Fountain interrupter



Feb. 19, 1952 RAs 2,586,382

FOUNTAIN YINTERRUPTERI Filed Dec. 8, 1949 MAX RAG B w;M W

=a PMkf ATTorwEvs Patented F eb. 19, 1952 UNITED STATES E ATENT {)FFICEApplication December 8, 1949, Serial No. 131,889 In Switzerland December13, 1948 2 Claims. 1

My present invention relates generally to improvements in rotaryprinting machine roller inkers and, in particular, to the fountaininterrupters thereof.

In prior-art arrangements for partially interrupting the ink feedthrough duct rollers, the duct-blade is adjustable by means of screwsfor regulating the ink. The said screws are disposed at short distancesfrom each other on the entire blade width. By tightening certain ofthese screws, the said blade is so adjusted that the ink feed isinterrupted to that portion of the duct roller which shall be renderedineffective. Such arrangement has the disadvantage that, owing to theresiliency of the duct-blade, the feed also is biased on a duct-rollerportion along which the blade is set for supplying the ink quantitynecessary for printing. In other words, there is no definite boundaryline between the effective ductroller portion and the duct-rollerportion set for ineffectiveness. A further drawback is the loss of timebrought about by the resetting of the screws when the entire rollerlength is to be rendered operative again, which causes quite some wasteof paper, since, as known in the art, the correct ink transfer isobtained only after the machine has been speeded up.

The said drawbacks are eliminated by my present invention in that theduct roller comprises at least two parts which are mounted partlyfixedly and partly loosely on the roller axle, and an arresting deviceis provided by means of which at least one loose roller portion isprevented from rotating, whereby the ink feed through the said rollerportion is interrupted.

One form of my present invention is shown by way of example in theaccompanying drawing, in which- Fig. 1 shows a duct-roller in elevation,with parts in section,

Fig. 2 is an axial section, in a larger scale, through the left-handportion of the duct roller, and

Fig. 3 is a section on the line IIIIII in Fig. 1, also in a largerscale.

A portion 2 of the duct roller is fixed to the duct-roller axle I, whileanother portion 3 is loosely mounted on the axle. The ink container isdesignated by 4, and the duct-blade by 5 (Fig. 3). The latter isadjustable by means of screws 6, and acts as supply regulator. A collar1 is keyed to the axle l at one end of the loose roller portion 3, andhas the same diameter as a bearing neck 8 which projects inwardly fromthe container 4 and is fixed thereto. A clamping ring 9 is mounted onthe collar 1 and is engaged to the roller portion 3 through a followerpin lli screw-fastened therein so that, in the position shown of ring 9,the roller portion 3 is coupled 2 to axle I and rotates together withthe roller portion 2. Ink thus is feed to the entire width of the ductroller.

When it is desired to interrupt the feed of ink through the rollerportion 3, the latter is arrested by slacking the ring 9, displacing itlaterally onto the stationary neck 8, as shown by dash-and-dot lines inFig. 2, and clamping it thereto. As the ring 9 also in this clampedposi-' tion is engaged to the loose duct roller portion 3, the latter isprevented from rotating and does not supply any ink to the blade 5. Whenit is desired to again supply ink to the entire width of the ductroller, one only needs to again displace the ring 9 and clamp it tocollar 1, whereupon the desired quantity of ink again is supplied to theentire width of the roller, since the blade 5 has not been disturbed inits setting.

In a modification of the duct-roller, the righthand end portion thereofalso could be formed as a loose roller portion.

What I claim as new and desire to protect by Letters Patent is:

1. In inking apparatus for printing apparatus operating through aroller-and-blade duct, an interrupter arrangement comprising a ductorroller made up of at least two portions at least one of which is looselymounted on a roller axle, an arresting device arranged at the end of theroller axle supporting the loose roller portion, said device comprisinga stationary tubular neck coaxially surrounding said end of the rolleraxle, a collar rotatably fixed to said axle at one end of said looseroller portion facing the said neck, a ring having clamping means forselectively clamping the said ring either to said collar or said neck,and coupling means fixed to said loose roller portion and rotatablyconnecting said portion with said ring in both clamping positions of thelatter.

2. An interrupter as claimed in claim 1, said collar being keyed to theroller axle and having the same outer diameter as said tubular neck,said clamping rin having a bore therein, said coupling means comprisinga follower pin screwfastened in said loose roller portion and extendingthrough said bore of the ring.

MAX RAS.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 453,408 Crowell June 2, 1891631,126 Prouty Aug. 15, 1899 767,125 Scott Aug. 9, 1904 2,154,896 GibbApr. 18, 1939

